JP2569942Y2 - In-hole lateral sampling device - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application] This invention uses a cast-in-place pile, an underground continuous wall, a muddy excavation hole such as a spiral auger, etc., to collect a soil sample in the horizontal direction of the inner wall of the hole, and to use boring data. The present invention relates to a sampling device for performing a current position test of a site to be compared or supplemented, or for directly judging a mud film formation state of a cast-in-place pile or an underground continuous wall by sampling.

[0002]

2. Description of the Related Art Conventionally, when soil is sampled and investigated, a method of performing boring and sequentially taking in soil into a thin wall sampler inside the rod has been generally used.

[0003] Conventionally, the investigation of the mud film on the inner wall of the muddy water drilling hole has been judged by a small filtration tester.

[0004]

In the conventional sampling using a boring rod, local soil in the range of the inner diameter is continuously sampled in the axial direction.
In this book, the data tends to be insufficient. In addition, the soil data may be condensed and the actual condition of the stratum may not be grasped. In deep geological surveys, it is necessary to drill deep into the required depth.

Further, it has not been possible to investigate the mud film on the inner wall of the muddy water excavation hole by boring.

[0006]

According to the present invention, in order to solve the above-mentioned conventional problems, a sampler casing 2 in which a supporting plate 3 perpendicular to the axial direction is fixed to the tip of a sampler cylinder 1 at the outer periphery of the tip opening. A cylindrical thin sampler 5 which is axially movable back and forth by the sampler cylinder 1 is housed inside the sampler casing 2.
A lateral sampling device in a hole, comprising a reaction force cylinder attached to the rear end of the sampler cylinder 1 via an adjusting rod, and a reaction force plate attached to the tip of an advancing / retracting rod protruding from the rear end of the reaction force cylinder. It is a suggestion.

[0007]

As shown in FIG. 2, a thin wall sampler 5
The sampling device in the state where the reaction plate 9 is contracted is suspended horizontally in the hole 13, and the reaction force cylinder 7 is extended at the sampling position to move the reaction plate 9 into the hole 13. While pressing against the inner wall, the supporting plate 3 of the sampler casing 2 is pressed against the inner wall of the hole 13 on the other side to fix the sampling device horizontally in the hole 13.

In this state, the sampler cylinder 1 is extended and the thin wall sampler 5 penetrates into the wall of the drilled hole 13 to take in the soil material S therein. Wall Sampler 5
The sampling device is lifted on the ground with the reaction force cylinder 7 contracted and the reaction force plate 9 contracted and retracted, and soil data in the thin wall sampler 5 is collected.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Sampler cylinder 1 such as air cylinder
A cylindrical sampler casing 2 having an open end is integrally provided at the end of the support member, and a supporting plate 3 perpendicular to the axial direction is fixed to the outer periphery of the end opening.

Inside the sampler casing 2 is accommodated a thin wall sampler 5 formed of a thin metal cylinder which is connected to the rear end of an advance / retreat rod 4 of the sampler cylinder 1 and is capable of moving back and forth in the axial direction.

A reaction force cylinder 7 is attached to the rear end of the sampler cylinder 1 via an adjusting rod 6, and is perpendicular to the tip of an advance / retreat rod 8 projecting from the rear end of the reaction force cylinder 7. The reaction force plate 9 is attached.

The length of the adjusting rod 6 is selected and mounted according to the size of the hole to be sampled, so that the entire length of the apparatus can be adapted to the hole.

The cylinders 1 and 7 are connected to hoses 11, 11 ′, 12 and 12 ′ for supplying and discharging a pressure fluid such as air to and from a pump 10 on the ground.

At the time of sampling using the sampling apparatus constructed as described above, the thin wall sampler 5 is housed inside the sampler casing 2 and the reaction plate 9 is retracted as shown in FIG. As shown in FIG. 1, the sampling device is suspended horizontally in the hole 13 and the reaction force cylinder 7 is extended at the sampling position to press the reaction force plate 9 against the inner wall of the hole 13. Then, the supporting plate of the sampler casing is pressed against the hole wall on the other side to fix the sampling device horizontally in the hole.

In this state, the sampler cylinder 1 is extended and the thin wall sampler 5 penetrates into the inner wall of the drilled hole 13 and the soil material S is taken therein. The sampler 5 is retracted, the cylinder for reaction force 7 is contracted, and the reaction force plate 9 is retracted and the sampling device is lifted on the ground in a state where the reaction force plate 9 is retracted.
Collect.

[0016]

[Effects of the Invention] As described above, according to the invention, since existing drilling holes such as cast-in-place piles and underground continuous walls are used, soil sampling can be easily performed without performing boring. Moreover, since a wide range of soil data in the horizontal direction can be obtained at any depth, if data is insufficient in the boring survey, useful information can be obtained at any position,
In addition, data to clarify boring data, such as reviewing the hydraulic conductivity and mud mix of excavation and pumping works, can be obtained.

Further, since the soil can be collected without disturbing the soil and without consolidation, the thickness of the mud film for stabilizing the pore wall can be grasped, and the uniaxial compressive strength and the state of mud film formation can be confirmed.

Further, since the apparatus can be made compact, sampling and investigation can be easily performed.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing a state in which the device of the present invention is suspended in a drilled hole.

FIG. 2 is a longitudinal sectional side view showing a state before use of the device of the present invention.

FIG. 3 is a vertical sectional side view showing a state where sampling is performed by the device of the present invention.

FIG. 4 is a longitudinal side view showing a state after sampling by the device of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sampler cylinder 2 sampler casing 3 support plate 4 advance / retreat rod 5 thin wall sampler 6 adjustment rod 7 reaction force cylinder 8 advance / retreat rod 9 reaction force plate 10 pump 11 hose 11 ′ hose 12 hose 12 ′ hose 13 drilling S soil material

Claims (1)

(57) [Scope of request for utility model registration] 1. A sampler casing in which a support plate perpendicular to the axial direction is fixed to the tip end of a sampler cylinder at the outer periphery of the tip opening, and a cylindrical shape which is movable in the axial direction by the sampler cylinder inside the sampler casing. Of the sampler cylinder, a reaction force cylinder is attached to the rear end of the sampler cylinder via an adjustment rod, and a reaction force plate is attached to the tip of an advancing / retracting rod projecting from the rear end of the reaction force cylinder. A lateral sampling apparatus in a hole, characterized in that: